Screw-machine.



PATENTED JUNE 25, 1907.

G. NEWTON. SCREW MACHINE.

APPLIGATIO N FILED JUNE 23,1902.

10 SHEETS-SHEET 1.

No. 857,893. PATENTEDJUNE 25, 190? e. NEWTON. SUREW MACHINE.

APPLICATION FILED JUNE 23, 1902.

10 SHEETS-SHEET 2.

PATENTED JUNE 25, 1907.

G. H. NEWTON.

SCREW MACHINE.

APPLIOATION FILED JUNE 23, 1902.

10 SHEETS-SHEET 3.

PATENTED JUNE 25, 1907 10 SHEETSSHEET 4.

Fly. i

No. 857,893. PATENTED JUNE 25, 1907. G. H. NEWTON. SCREW MACHINE.

APPLICATION FILED JUNE 23, 1902.

10 SHEETS-SHEET 5.

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10 SHEETS-SHEET 6.

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PATENTED JUNE 25, 1 907.

G. H. NEWTON. SCREW MACHINE.

APPLICATION FILED JUNE 23, 1902.

10 SHEETS-SHEET 7.

PATENTED JUNE 25. 1907.

G. H. NEWTON. SCREW MACHINE. APPLICATION FILED JUNE 23, 1902.

10 SHEETS-SHEET 8,

, n wmbo hwm 52M PATENTED JUNE 25, 1907.

G. H. NEWTON. SCREW MACHINE. APPLIOIATION FILED JUNE 23, 1902.

10 SHEETS-SHEET 9.

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UNIT D STATES PATENT OFFICE.

GEORGE NEWTON, 01 PROVIDENCE, RHODE ISLAND, ASSIGNQR .To BROWN AND SHARPEMANUFACTURING COMPANY, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

SCREW-MACHINE.

Specification of Letters Patent.-

Patented June 25, 1907.

Application filed June 23,1902. .Serial No. 112,826.

To all whom it may concern.- ,Be it known that I, GEORGE HVNEWTON,

of the city and county of Providence and State of Rhode Island, have inven'tedcertain new and useful Improvements in Screw- Machines; and I do hereby, declare the following specification, taken in connection .withthe accompanying drawings, forming a part of the same, to be a full, clear, and exact escription thereof. 7, I

The invention relates to that class of machines commonly called screw machines or turret lathes in which the screws or other articles being formed are acted upon by a series. of tools or devices carried in a revolving holder or turret which is turned upon its axis to bring the devices carried The features of the present invention havebeen embodied in this type of machine, al-

though it will be understood that the differ- I ent features may be embodied in other types of machines which do not have all the charof a device having a uniform throw or range of action, such for instance as a cam or a crank pin. It is'usually, if not always, ad-

vantageous however to advance the turret 'to varying distances for different tools, and one feature of the invention relates to means for accomplishing this result, and consists in providing means for varying the effect of the operating device upon the turret according to the requirements of the diflerent tools. This means preferably comprises a slide which. is givena uniform reciprocation and a series of adjustable abutments corresponding to the tools in the turret and successively brought into the path of theslide by the indexing movements of the turret.

-A further feature of invention relates to the mechanism for operating the cross slides of which there are two in the machine referred to. These slides are mounted indeendently and are operated independently y cams secured to drums having their axes parallel with the movement of the slides. This arrangement enables a simple and compact connection between the cross slide and its operating cam, such for instance as a roll on the slide directly engaging the cam. The cam is removably and adjustably secured to the drum, and the roll on the slide is also preferably adjustable for the purpose of getting fine and accurate adjustments with convenience and quickness.

- Further features of invention relate to the devices for locking and indexing the turret, to the devices for advancing the turret with varying speeds for different tools, and to other combinations and arrangements of parts which contribute to the eliiciency and simplicity of the machine and which will be 'more particularly pointed out in the claims.

In the drawings Figure l is a front elevation of an automatic screw machine embodying all the various features of the invention, Fig. 2 is a. rear elevation, Fig. 3 is an end view, Fig. 4 is a cross sectional view on line 44, Fig. 7, Figs. 5 and 6 are horizontalsecpin 32, Fig. 7 is a vertical sectional view through the axis of the turret, Fig. 8 is a sectional view on line 8'8, Fig. 7,'Figs. 9 and 10 are details of the clutch shipping mechanism, Figs 11 and 12 are details of the cross slide and operating cam, Fig. 13 is a view of a second form of turret operating mechanism, and Fig. 14 is a view showing the groove in the slide for connecting the turret slide and its operating means.

In the machine shown the articles are formed from a rod of stock held in the jaws of a chuck carried by the spindle 1, the rod being fed forward. after the completion of each article by a feeding tube 2. The construction of the chuck and the'feeding tube may be of any well known construction, such for instance as shown in the patent to S. R.

Worseley, granted July'30, 1895, No. 543,606.

The lever 3 foropening and closing the cam is connected with the feed tube through i a lever 7 and slide 8 similar to the lever and volv es in the opposite direction to. shaft 13 whileigear 9 is driven in the same direction as shaft 13 through an intermediate gear 14 which engages gear 9 and a pinion 15 secured to shaft 13. The lever 16, which shifts the clutch 11 from one gear to the other to reverse the direction of rotation of v the spindle, is operated bya cam 17 which is revolved a half revolution. at suitableintervals to shift the clutch first in one direction and then in the other and thus reverse the direction of rotation of the spindle. mechanism for rotating the cam 17 consists of a constantly rotating gear 18 and a clutch 19 connected with'the cam andarranged to be intermittently engaged with a clutch face on the gear. The clutch 19 is in the form of a sleeve connected with the cam by a coupling which allows the sleeve to move longitudinally without being disconnected from. the caml The clutch 19 is pressed toward the gear 18 by a spring 20, and is normally held out of engagement with the gear 18 by one or the other of two abutments 21 and 22 which engage one or the other of two earns 23 and 24 formed on the clutch sleeve and located on diametrically opposite sides of the clutch sleeve. The abutments 21 and 22 are in the form of pins on the ends of levers 25 and 26 which extend transversely "of the machine and are operated at the proper times by tappets 27 and 28 adjustab y secured to a disk 29 secured to a shaft 30 at the front of the machine. ith the parts in the position of Fig. 2 the clutch 19 is held out of engagement by the abutment 21 and cam 23. When the lever 25 is rocked the clutch sleeve is released and is engaged with gear 18 by the s ring 20. The clutch and cam 17 now revo ve until cam 24 engages abutment 22, when the clutch is again thrown out ofengagement with gear 18 and held out until the lever 26 is rocked and the clutch sleeve again released. The =-le'yers 25 and 26 are returned immediately after being rocked by springs 31, and the pins 21 and 22 ride on the pcriphery of the clutch sleeve until engaged by the cams. A pin 32 on the end of a spring pressed arm 33 engages notches in a collar 34 secured to the cam 17 and prevents overrunning of the cam and holds the cam in position. The mechanism for intermittently re- The I .of engagement with the gear by an abutment 38 which. engages a cam 39 formed on the clutch sleeve. The abutment is in the form of a pin carried on the rear end of lever 40 the front end of which is arranged to be engaged by a tappet 41 carried by a disk 42 secured to the shaft 30. The clutch sleeve 35 is normally held from rotation by a pin 43 on the end of a'spring pressed arm 44 which engages a notch in the clutch sleeve, the pin and notch being similar to the pin 32 and notch shown in Fig. 5". When the lever 40 is rocked the clutch 35 engages the gear 18, and the clutch and pinion 36 revolve until the abutment 38 is returned into the path of the cam 39, when the clutch is again disengaged and held until the lever 40 is again rocked. The abutment 38 is held out of the path of cam 39 until the camshaft 5 has nearly completed a revolution by a cam 45 secured to shaft 5 and arranged to act upon the lever 40. The card 45 also acts upon the arm 44 and holds the pin 43 out of engagement'with the clutch sleeve while the shaft 5 is being rotated. When the shaft 5 has nearly completed a revolution the cam .45 allows the lever 40 to return to normal position so that thecam 39 engages pin 38 and throws the clutch sleeve 35 out of engage-. ment with the gear 18. The shaft 5 now remains at rest until the lever 40 is again rocked. These mechanisms for operating the spindle clutch and rotating the cam shaft-- 5 are mounted upon a shaft 46 which is secured in a bracket 47 bolted to the frame of the machine. The gear 18, pinion 36, and cam 17 are loosely mounted on the shaft 46 and the gear 18 is held in place between the hub of pinion 36 and a sleeve 48 to which the cam 17 is secured. The clutch sleeve 19 is mounted to slide on the sleeve 48 and the clutch sleeve 35 is mounted to slide on the hub of pinion 36. This forms a simple and compact construction which may be cheaply and conveniently made and assembled, and by mounting the mechanisms in a separate bracket the mechanism may be conveniently assembled and then secured bodily in place.

The rod of stock carried in the jaws of the spindle is acted upon by a series of tools carried in a turret 49 which, as shown, is provided with six tool sockets. The turret is mounted in a turret slide 50 guided in ways in the frame, the turret being arranged with its axis parallel to the axis of the spindle 1. The turret is secured to a shaft 51 which extends rearwardly from the turret and is supported at its outer end in a bearing 52 on the turret slide which surrounds a sleeve 53- secured to the shaft. The turret slide is re-,

to bring the tools successivelyinto position to" act upon the rod of'stock. The device which reciprocates the turret has a uniform throw,-

and in case the motion due to the operation of this device is transmitted directly tothe' turret theturret will be moved through the same distance at each reciprocation, or in otherwords, the turret will be advanced the same .distance for each tool In such case the length of cut for the different tools will depemLon the distance the tools project from the turret, the tools which project to the greatest extent having the longer cut. It is more advantageous, however,-to'mount the tools close up to the turret and to regu. late the length of cut by'regulating the distance through which the. turret is advanced according to the length of cut required. To enable this to be done, when the device for reciprocating the turret has a uniform thrown means are rovided for regulating the effect of said device on the turret according to the requirements of the respectiye'tools, and a simple and efficient form of such means is that which is embodied in the machine shown; This form ofsuch means consists of a slide 54 mounted in guides formed in the turret slide and operated through the .same distance at each reciprocation by the device forreciprocating the turret. The motion of the slide 54 is transmitted to the turret through a series of adjustable abutments in the form of blocks 55 mounted in grooves in the sleeve 53. 1 These blocks are engaged by a series of screw rods 56 having squared ends for receiving an operating wrench by which the screws may be turned to adjust the blocks. The number of blocks corresponds to the number of tool sockets in the turret, and by the indexing movements of the turret the block corresponding-to the tool which is brought into operative position is brought into the path of a projection 57 on the slide 54. The distance throu h which the turret is advanced'for any todl will depend on theadjust-ment of the corresponding block 55, since the forward movement of slide 54 will not be transmitted to they turr t until the slide en ages the block 55. T eturret is returne each time to the same position by the engagement: of the slide 54 with a fixed abutment 58 on the turret slide formed by the end of the slot in which the slide.54 is guided.

The device for reciprocating the turret may be of any suitable construction, and I have shown two devices either of which provides a simple and, efficient means for reciprocating the turret and each of whichhas a uniform throw. The device shown in the v mam views and in Fig. 7 consists of a cam 59 secured to a shaft 60 and having a cam groove which engages a roll 61 on the slide 54 and moves said slide forward and back for each revolution of the cam. The cam groove is soshaped that the slide 54, and consequently the turret slide, remains in its retracted position long enough for the indexing of the turret tobe effected.

turret consists of acrank 62 which engages a transverse groove. in the slide 54 Fig. 14,

and advances andretracts the slide for each revolution "of the crank. The crank is carried by adisk 63 on the upper end of a sleeve In 13 the device for reciprocating'the 64/n1ounted on a fixed stud 65 'A bevel gear I 66 is secured to the sleeve 64 and is engaged bya similar bevel gear 67 secured to the shaft 60 corresponding to the shaft 60 in the other construction. The bevel gears are of the saine size so that the crank will make one revolution forone revolution of shaft 60*.- The groove-inslide 54 is provided with a curved central part,Fi 14 which is concentric with the crank dis when the slide 54 is in itsrearward position. While the crank is moving in this curved part the slide remains at rest in its retracted position long enough for the indexing to take place. When the slide 54 is being advanced by the crank the curved groove acts to modify the effect of the crank, so that the entire forward movement of the slide is very nearly at a uniform speed.

The shaft 60 (or ,60) is driven through a wormwheel 68 secured to the cam 59 (or gear-67) and engaged by a worm 69 secured to a transverse shaft 70. Durin the time the tools are operating on the WOI' the shaft i 70 isdriven at a slow speed toslowly advance theturret, but after a tool has finished itspinion 74 engages a pinion 75 secured to a shaft 76 geared to the shaft 70 through bevel gears 77, the pinion 74 having a sufficiently long face to allow longitudinal movement of the clutch sleeve without, disengaging the pinions 74 and 75. When the'clutch sleeve is engaged with pulley 71 the shaft 70 is driven at'a high speed. The pulley 71 also serves to drive the gear 18 through the medium of a shaft 71 connected with the pulley through gears 72 and connected with the gear 18 through gear 18 (Fi 5).

When the shaft 70 is tobe J riven at a slow the shaft 72 and-carryinga pinion 74. The

speed the clutch sleeve 73 is shifted to disengageit from the ulley71 and to bring aclutch face 79formed 0 the sleeve into engagement with a clutch face 80 formed on the hub of a slow running worm wheel 81 which is also loosely mounted on the shaft 72.

When the clutch sleeve 73 is in mid-position neither driving mechanism is in operation, and at such time the turret maybe operated by a handle applied to the squared end of shaft 70 (Fig. 6);

The speed at which the turret should be advanced during the operation of a to l will depend on the character of the tool and for the most eflicient work the machine should be capable of adjustment to vary the speed at which the turret is advanced to suit the requirements of the tool which is to operate upon the work. To give the machine this capacity mechanism is provided for varying the speed of the worm wheel 81, and consequently of the devices for advancing the turret during the operation of the tools, and this mechanism is so constructed that it may be adjusted to give the turret any, desired speed of advance at the time any particular tool is operating. The. worm wheel 81 is driven through a worm 82 secured to a worm shaft 83 to which is also secured a friction disk 84. The disk 84 is engaged by .a friction disk 85 which also engages and is driven by a friction disk 86 secured to a shaft 87, the disk 85b0- ing arranged between the overlapping faces of disks 84 and 86, and being adjustable radially of said disks to vary the speed of the driven disk 84. The driving disk 86 is driven by a belt passing over the pulley 93 formed on said disk, and the disk 86 is forced toward disk 84 by means of a spring 88. The spring 88 is interposed between a bushing 89 which surrounds one end of shaft 87 and a sleeve 90 loose on said-shaft and separated from a second sleeve 91 by a series of balls. The sleeve 91 engages a shoulder on the shaft 87. The pressure between the disks may be varied by adjusting the bush.- ing 89, a'screw 92 being provided for the purose. p The intermediate disk 85 is mounted on a rod 94 mounted in suitable bearings and moved vertically to move the disk radially of the disks 84 and 86 through a segment 95' which engages rack teeth formed on the rod. The segment 95 1s secured to one end of a rock shalt 96 to the other end of which is se-' cured an arm 97 carrying a pin 98 which engages a cam 99. the lower end of rod 94 and serves to keep the pin 98 in engagement with the cam 99. The cam 99 formed by a series of blocks 1.01 'adjustably 'secured upon a circularly arranged series-i'of pins 102 extending from a disk 103. These blocks are secured in position by clampin bolts 10%, and by adjusting the'blocks on the pins the configuration of Aweight is secured to the cam may be adjusted to give the disk 85 any desired position at any particular time in the revolution of the cam 99.

The cam disk 103 is secured upon the outer end of the shaft 30 and made in the form of a gear which is driven from the turret cam shaft 60 through a pinion 105 on said cam shaft and an intermediate gear 106. The pinion 105 and gear 103 are so proportioned that the gear 103 makes one revolution for each complete indexing of the turret, that is, in the present machine the gear 103 makes one revolution for six revolutions of shaft 60. By adjusting thejbloc'ks 101 the position of the disk 85, and consequently the speed of advance of the turret during the operation of each tool, may be adjusted to suit the requirement of such tool, thus enabling the machine to be readily adjusted to suit the piece of work to be done.

The clutch sleeve 7;, is automatically shifted from the fast to the slow driving mechanism and vice versathrough the action of pins 107 and 108 adjustably secured in grooves .l'ormed in a ring 109 secured to the disk .103. The pins 1.07 are arranged to act upon intermediate shil'ting mechanism to cause the clutch sleeve 7 3 to engage with the high speed pulley 71, and the pins 105 are ar ranged to act upon the shifting mechanism to cause the clutch sleeve 73 'to be engaged witlrthe slow speed worm wheel 51.

The intermediate shifting mechanism is shown in Figs. 6, 9, and 10. A ring 110 is mounted in a groove in the sleeve 73 and is connected with one end of a bell crank lever 111 the other end of which is connected by means of a link 112 with a rock arm 113. The rock arm 113 is arranged between two screws 114;115, carried in lugs 116 on a pivoted plate 117 which is swung in one direction or the other to operate the rock arm and thus shift the clutch sleeve. The screws 114 and form adjustable shoulders for engaging the arm 113, and by adjusting these screws the lost motion between the swinging plate and the rock arm may be properly adjusted. The initial movements are given to the plate 117 in shifting the clutch sleeve by the pins 107 and 108 which are arranged to engage opposite sides of a 'V-shaped cam 1.18 carried by the plate. 117 are completed. by the action of a spring pressed belt 119 having a conical head 120 arranged to act upon a pin 121 projecting from the plate 117.

Supposing the clutch sleeve 73 to be in en' The movements of the plate movement of the pin. When the center of the pin 121 passes the point of head 120 the left side of the head acts upon the pin 121 and suddenly completes the movement of the plate I117, thus shifting'thc arm 113 and also shifting the clutch sleeve from worm wheel 81 into engagement with pulley 71. The parts are now in thedotted line positionFig. 9.

YVhen a pin 108 now engages the underside of the cam 1 18, the plate 117 is swung toward the right until the screw strikes the arm 113 and pin 121 passes'the point of head 120,

when the parts are quickly returned to fullline position. I

The automatic shifting mechanism may be thrown out of action by moving the slide 122, on'which the cam 118 isformed, into the position shown in dotted lines Fig. 10 or full lines Fig. 6,"so that the oamis out of the path of pins 107 and 108. The shifting mechan ism may be operated manually through a handle 123 carried by the slide 122.

In order that the automatic operation of the turret may be readily stopped a cam le- Ver is provided which will shift the clutch sleeve 73into mid-position from whatever position it may occupy. This lever 124 (Fig. 4) is provided with two oppositely disposed cam surfaces 125 and 126 arranged to engage a pin 127 projecting from the rock arm 113. This lever is normally in the dotted line position, Fig. 4, where it will not interfere with the movements of the arm 113. If it is desired to throw the clutch sleeve 73 into mid-position thelever is swung into full llIIGPOSltlOIl, and in this movement either cam 125 or 126 acts on pin 127 and swings the arm 113 into mid-position. This brings the pin into the socket at the intersectionof the' cams 125 and 126, and the pivot of the lever is so arranged that with the pin in this position the lever acts as a lock to prevent movement of the arm 113 under the infiu.-..

docking segment 131 which engages a series of locking segments 132 on the disk 128. When i the turret slide is in its retracted position the disk 128 is in position to be engaged by the segment 127, and the segment is timed to engage the disk as soon as the turret is retracted. The toothed segment 129 engages one of the se nients 130 and revolves the turret untilthe ocking'segment 131 engages one of the locking segments 132, when the rotation of the turret is'sftopped'and the turret is held in position until the segment 131 has passed by the segment 132.

The turret is held inits indexed positions by means of a locking bolt 133 (Fig. 8) mount- .ed in the turret slide and arranged .to en age a series of sockets 134 in the periphery o the turret. The locking bolt is withdrawn just previous to the operation of the indexing mechanism by a cam 135 secured to shaft 60 and arranged to engage one end of a lever 136 the other end of which engages a recess in the bolt 133. The bolt is returned when re leased by the cam by means of a spring 137.

In addition to the tool carrying turret, the machine-is provided with two cross slides 138 upon which additional tools may be secured, and certain features of the invention relate to the devices for operating these slides. These slides are operated independently of each other from cams carried upon cam drums 139 which are secured to a shaft 140 arranged across the machine with its axis parallel to the movements of the slides. The shaft 140 is driven from the shaft 30 through bevel gears 141, one of which is secured to'a drum 139 and the other of which is mounted upon a stud 141-and is formed integral with a spur gear 142 engaged by'a s ur gear 143 on shaft 30. The shaft 140 ma es one revolution foreach-complete indexing of the turret. Each drum 139 carries a cam 142 (Figs. 11 and 12) arranged'to engage a roll 143 connected with a slide 138. The cam 142 is held in position by a bolt 144 which passes through one of a series of holes 145 in the flange 146 of the drum and en ages one of a series of holes 147 in the edge 0 the cam. These two series of holes are arranged diflerently, so that any desired adjustment of the cam may be ap roximately obtained by bringing different oles in the. twoseries into register. cross slide and its operating cam is effected by adjustment of the roll 143 on the cross slide. For this urpose the roll 143 .is mounted upon. a shde 148 guided in a groove in the cross slide and'adjusted by means of a screw 149 which engages a nut 150 formed on the slide 148. This construction and arrangement provides a simple and efiective means foroperating a cross slide, or in case slide independently. The arran ement of the cam drum with its axis para lel to the movement of the cross slide enables the use of a simple and direct connection between the cam and slide, and also enables the drums The fine adjustment between the two cross slides are used, for operating each speed clutch 80, Fig. 6.

front-end with means for holding a tool, and

provided at its rear endwith a pinion 153.

For the purpose of driving the spindle 152,

a sleeve 154 is mounted on the turret shaft 51 and .is provided with a'pulley 155 over which a driving belt may be passed. The

varied by using a cross or open belt on. the

pulley 155, or two intermediate pinions may e mounted on the turret between the sleeve 151 and s indle 152. When the spindle 152 is not to e used it may be removed by taking off the pinion 153 and then removing the sleeve 154.

. In is as followsi Suppose an article to have been completed and severed from the rod of stock, the tappet 41, Fig. 1, operates the lever 40 so that clutch 35,Fig. 2, engages gear .18, and drives the cam shaft 5 a single revolution. During this revolution the cam 4 acts to open and close the jaws of the chuck and cam 6 acts to advance the feeding tube? to 1 feed forward the stock and then return the feeding tube to its rearward position. The

turret is then advanced by the cam 59 which is driven during the cuttin from the slow ien the turret reaches the end of its forward stroke the clutch 73 is shifted into engagement with the high speed pulley 71 by the action of one of the pins 107 on the cam 118, Figs. 6 and 9. The cam 59 and shaft are now driven at a high speed until one of the pins108 operates on the cam 1 18 and shifts the clutch 73 into engagement with the slow speed clutch 80. During this time the cam 59 acts to quickly return the turret into its rearward position, the turret locking bolt is withdrawn and the indexing segment acts to index the turret, after which the cam 59 advances the turret until the tooLis brought up to the work. At this momeiit the clutch is shifted to the slow speed drive. The speed of the cam 59 duringthe' action of the successive tools is regulated by the cam blocks 101 on the disk 103 which makes one revolution for each complete indexing of the turret. The

cross slides are operated independently and are moved in by their operating cams at the proper times, de ending upon the work which they are to o.

What I claim as my inventionand desire to secure by Letters Patent is:

1. In a screw machine, the combination,

' with a turret, of means for reciprocating the same, having a uniform throw, and means for varying the extent to which said reciprocatmg means moves the turret for dlfferent tools, substantially as described.

2. In a screw machine, the combination,

with a turret, of a device for reciprocating the general the operation of the machine tially as descri same having a uniform throw, and means in 'termediate said device and the turret for varying the extent to which said device moves the turret for different tools, substan tially as described. j

In a screw machine, the' combination, with a turret, of a device for reciprocating the same having a uniform throw, and a seriesof adjustable devices corresponding to the sockets in the turretfor determining the extent to'which said device moves the turret, substantially as described.

4. In a screw machine, the combination, with a turret, of a crank for reci rocating the same, and means for varying t e extent to which the crank moves the turret for different tools, substantially as described.

5. In a screw machine, the combination, with a turret, of a crank for reciprocating the same, and means for producing a dwell in the movement of the turret at the end of its rearward movement, and for modifying the action of the crank during the advanceof the turret, substantially as described.

6. In a screw machine, the combination,

.with a turret, of a crank for reciprocating the same, a slide intermediate the'crank and turret' provided with a transverse groove shaped to produce a dwell in the movement of the slideat the end of its rearward movement, and a series of adjustable abutments for connecting the turret and slide in difierent indeXed positions of the turret', substantially as described.

7. In a screw machine, the combination, with a turret, of a reciprocating turret mov ing slide, and a series of adjustable abutments connected with the turret and successively engaged by said slide, substantially as described.

8. In a sc'fw machine, theicombination, with a turret, of a reciprocating turret moving slide, a series of adjustable abutments corresponding to the series of tool sockets on the turret and arranged to be successively brought into the path of the slide by the indexing of the turret, substantially as de scribed.

9. In a screw machine, the combination, with a turret, of a series of adjustable abutments connected therewith, screw rods for adjusting said abutments, a turret moving slide arranged to successively engage the abutments as the turret is indexed, and means for reciprccating said slide, substan- 10. In a screw machine, the combination, with a turret slide, of a turret mounted therein, a circularly arranged series of abut ments mounted on adjusting screws, a turret moving slide arranged to engage a fixed abutment on its return stroke and to engage one of said adjustable abutments'on its forward stroke, and means for reciprocating said slide, substantially as described.

Lil

11. In a screw machine, the combination, tions for operating the turret, of a shaft- 72, a

with a turret, slide, of a turret mounted therein wit h its axis in the direction. of movement of the turret slide, a series of adjustable abutments arranged about the axis of said turret, and a recipro ating turret moving slide arranged to engag said abutments. substantially as described.

1'2. ln. a screw machine, the combination, with a turret, of a shaft for reeipro 'a-ting the turret whit-h maltes one revolution for each reciprocation ol' the turret, a segment rarried by said shalt. provided with a toothed portion and a locking segment and a disk connected with theturret provided with a, seriesol toothed segments and locking ments, substantially as described.

13. lo a screw machine, the combination, wit h a turret slide, of a t urret mounted therein. ashal't which makes one revolution for *aeh reciprocation of the turret slide, a device ope 'ated' by said shaft which hasauml'orm throw, eonneetimis between said device and the turret slide, and mechanism for indexmg the turret from said shaft, substan- I tial ly as described.

H. in a screw machine, the combination, with a turret slide, of a turret mounted there in, a shaft which makes one revolution for each reciprocation of the turret slide, a devn'e ope 'ated by said shalt'wlnch. has a uml'orm throw. connections between said device and the turret slide, mechanism fornnlexing theturret from said shaft, and aturretloeking devlee operated from said shalt, substan tially as described.

15. A ram-disk for controlling the speed of the turret-advam-ing mechanism, said ramdisk being provided with a series of pins projecting laterally l'romsaid diskand witheamblocks adjustabl) clamped on said pins, sub stautially as described.

HS. in a st're\\' machine, the eombination, with mechanism l'orreciprocating the turret of a high speed driving meehanism, an independent slow speed driving mechanism, mechanism for alternately connecting said driving mechanisms, with the reeiproeating mechanism, and means for varying the speed ot'theslowspeed mechanism, andspindleeontrollingmechanism driven bysaid highspeed -mechanism, substantially as described. 7

IT. in a screw maehine, the combination,

with a turret, a worm shaft 70 and connechigh speed clutch sleeve mounted on said shaft 72, a slow speed clutchsleeve also mounted on shaft 7;, a clutchintermediate said clutch sleeves, and gearing between said clutch and shaft 70, substantially as described 1b. In a screw machine the combination with mechanism for reciprocating the turret, 3 of high speed driving meehanism, an independent slow speed meehanism, mechanism for alternately em'inect ing said driving mechanisms with the reciprocating -mtchanism meaas for varying the speed of the slow speed mechanism, and mechanism for controlling the stock driven by the high speed mechanism,- substantially as described.

it). In a screw machine the combination. with a turret, of a slide havinga uniform recipro 'ation through which motion is trans mitted to the turret, and means for varying the extent ti-oflwhich said slide moves the tur ret for dill'ere-nt tools, substantially as described.

.20. lo. a screw machine the combination with a turret,of a slide having a uniform re- I eipro 'ation through which motion transmitted to the turret, a series ol adjustable devices 'eorrespomling to the sockets in the turret for determining the extent to which said slide moves the turret, substantially as described.

21. In a screw machine the combination with a turret, ofa rotary device having a uniform throw, a device given a uniform re eiprotaition thereby, connections between said reeiproeating device and the turretfor varying the extent to which said device moves the turret for ditl'erenttools. substantially as described.

2;. in a screw machine the combination with the turret provided with sot'litls, of a sleeve mounted in one of said sockets, a spindle mounted to revolve in said sleeve. a gear on the rear end of said spindle, a shaft to which the turret is secured,'a driving sleeve loosely mounted on said shaft and gearing between said driving sleeve and spindle gear, substantially as described.

GEORGE ll. NEW'lUN.

\Vitnesses:

\V. H. 'lnURs'roN, t J. H. 'lnunsron. 

